The roofless rectangular shell, roughly nine and three-quarter metres long internally and just over five and a half metres wide, is built from coursed limestone slabs and some very large boulders at the base of the walls. It is most likely the nave of a church that once continued eastward into a smaller chancel, though that eastern portion has all but disappeared.

The building rewards close attention to its fabric. The doorway in the western bell-gable, now filled in, was a late insertion and is framed by two large slab lintels. Above it, a round-arched window with a keystone was constructed using a mixture of punch-dressed limestone and sandstone, the two materials sitting together slightly awkwardly, as though sourced from different supplies or different periods. Along the southern wall, four large window openings are also late additions, and one of them was built partly over an earlier blocked doorway, which is thought to be the church's original southern entrance. Even the semi-circular arch in the eastern gable shows signs of complexity; wall foundations run visibly across its opening, suggesting it too may not be as original as it looks. By 1692 the whole structure was recorded as being in ruins, and the alterations to the southern wall were probably made not long before that date, a last round of modifications to a building that was already approaching abandonment.

The layering of changes, blocked doors, inserted windows, a chancel reduced to faint foundations, makes this a useful place for anyone interested in how late medieval parish churches in Ireland were adapted and eventually left to deteriorate, the evidence of those adaptations still legible in the stonework itself.